Tattoo help?

Hey everyone. I'm a 19 year old college student. I've always been fascinated by tattoos, but I've never had a really good idea for one of my own and thus do not have any :(

Being hella bored today and procrastinating on an essay, I started looking at tattoo ideas on Pinterest. I need some advice from ladies with tattoos!

I used to self harm and have many scars on my thighs now because of it. I want to get a tattoo somewhere on either thigh that really means something to me. Something that shows how far I've come, how strong I am, etc. I don't wanna go bold enough to get a huge tattoo that covers my entire thigh (although those are very beautiful). I just want something smaller and with a more minimalist design.

The designs that I'm really drawn to are of either a yin yang sign (to symbolize the balance in life that I strive to have) or a simple arrow (to remind myself to keep moving onward). I also might want to include the words "so it goes" above or within the arrow.

I'm having trouble on where I'd want to place the tattoo on my thigh though. Any advice? Thanks!